python写入xml文件的方法

from xml.dom.minidom import Document
doc = Document()
people = doc.createElement("people")
doc.appendChild(people)
aperson = doc.createElement("person")
people.appendChild(aperson)
name = doc.createElement("name")
aperson.appendChild(name)
personname = doc.createTextNode("Annie")
name.appendChild(personname)
filename = "people.xml"
f = open(filename, "w")
f.write(doc.toprettyxml(indent="  "))
f.close()